var images = 
"pic1.jpg,pic2.jpg,pic5.jpg,pic14.jpg,pic15.jpg,pic19.jpg,pic23.jpg,pic24.jpg,pic25.jpg,pic35.jpg,pic49.jpg,pic53.jpg,picbus1.jpg,picbus2.jpg,picbus3.jpg,picbus4.jpg,picbus5.jpg,picbus6.jpg,picbus7.jpg".split(",");
var num = Math.round(Math.random() * (images.length-1));
var img = images[num];
if(img) document.images['picpro'].src = 
"http://www.openband.net/images/pics/" + img;